Yohannes Wijaya

Several reading of interest: [Document-Based App Programming Guide for iOS](https://developer.apple.com/library/content/documentation/DataManagement/Conceptual/DocumentBasedAppPGiOS/Introduction/Introduction.html#//apple_ref/doc/uid/TP40011149-CH1-SW1) [Designing for Documents in iCloud](https://developer.apple.com/library/content/documentation/General/Conceptual/iCloudDesignGuide/Chapters/DesigningForDocumentsIniCloud.html#//apple_ref/doc/uid/TP40012094-CH2-SW1) [How can I migrate the data from the iCloud store file to a new store...

https://www.raywenderlich.com/139322/firebase-tutorial-getting-started-2

Look at the sampe entry.

https://github.com/dekatotoro/SlideMenuControllerSwift

Refer to the the deleteNote(at:) method.